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[Q] Problems by unlocking and locking bootloader ?

Greetings fellow , several weeks ago I decided to unlock the bootloader to test different ROM , I tried many and I stay with cyanogenmod . Given that came to my C2104 official update from sony to 15.3.a.1.17 , I decided to lock my bootloader . I tried a few hours the new official firmware and I was so disappointed by his failures I decided to return to the CyanogenMod ROM . I went to unlock my bootloader but since every ROM I try very unstable , contacts are lost , almost all applications I open lock and close, I have signal problems wifi and 3G (perform all wipes needed for each installation used ) . because I 'm desperate .. block before returning to my bootloader any ROM that proved it worked perfect, but now after the new block and subsequent release any ROM is stable. To top it all went back to the stock ROM 15.3.a.1.14 that has been the stock that has worked best for me and I will ... Did fatal ruin my xperia for having repeatedly locked and unlocked bootloader ? sorry my English

CHARLY_1986 said:
Greetings fellow , several weeks ago I decided to unlock the bootloader to test different ROM , I tried many and I stay with cyanogenmod . Given that came to my C2104 official update from sony to 15.3.a.1.17 , I decided to lock my bootloader . I tried a few hours the new official firmware and I was so disappointed by his failures I decided to return to the CyanogenMod ROM . I went to unlock my bootloader but since every ROM I try very unstable , contacts are lost , almost all applications I open lock and close, I have signal problems wifi and 3G (perform all wipes needed for each installation used ) . because I 'm desperate .. block before returning to my bootloader any ROM that proved it worked perfect, but now after the new block and subsequent release any ROM is stable. To top it all went back to the stock ROM 15.3.a.1.14 that has been the stock that has worked best for me and I will ... Did fatal ruin my xperia for having repeatedly locked and unlocked bootloader ? sorry my English
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i dont get the question u r asking..hehe but i think u r asking if relocking and unlocking bootloader will damage or ruin the phone, am i right? we'll to solve ur problem there are instances that it will brick ur phone and there are instance also that it will succesfully loack, i think it will be differ on the build of the board..just an advice, if u wanted to try other ROMs better not to relock ur bootloader so it wont mess up ur phone..stay unlock

mizukage said:
i dont get the question u r asking..hehe but i think u r asking if relocking and unlocking bootloader will damage or ruin the phone, am i right? we'll to solve ur problem there are instances that it will brick ur phone and there are instance also that it will succesfully loack, i think it will be differ on the build of the board..just an advice, if u wanted to try other ROMs better not to relock ur bootloader so it wont mess up ur phone..stay unlock
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Thanks for replying. I know the risks of opening the bootloader. In short I mean, excluding damage, the phone may become unstable by opening and closing the bootloader

Locked bootloader mi4c nougat

I flashed xiaomi.eu_multi_MI4c_7.2.9_v8-7.0.zip and has bootloader locked and i tried to unlocked but IT said that IT is a diferent account on my device and is stop at 50% , please If someone knows what to do . My account have permissions

flash Official ROM before you try
Xiaomi.eu rom is not an official one.

It doesn't matter. On xiaomi.eu is possible to unlock bootloader.

I tried every metod i can not flash 6.1.7 ,i can not unlock it , when i try to go in recovery is just restart , i can not go in edl mod the same is restarting , i want just to update every time when a update is up

lukyy81 said:
I tried every metod i can not flash 6.1.7 ,i can not unlock it , when i try to go in recovery is just restart , i can not go in edl mod the same is restarting , i want just to update every time when a update is up
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https://xiaomi.eu/community/threads/7-2-16-17.38651/page-15#post-353989

I have the same problem with you.I have no choice and I just flashed the elder MIUI with MiFlash by 9008 mode.

Can't unlock mine too,
just did this guide:
https://forum.xda-developers.com/mi-4c/general/guide-unlocking-mi4c-bl-verification-t3336779

ON ANDROID 7 YOU CANNOT UNLOCK BOOTLOADER AS IN THAT GUIDE, IT'S WRITTEN in THREAD, JUST READ IT.
however you have to unlock it in official way. after receive sms wait, wait and wait. I waited 1 month, ONE MONTH, to unlock it. I've unlocked it first with unofficial but ANDROID 7 of xiaomi.eu lock it again, again and again.

croccio said:
ON ANDROID 7 YOU CANNOT UNLOCK BOOTLOADER AS IN THAT GUIDE, IT'S WRITTEN in THREAD, JUST READ IT.
however you have to unlock it in official way. after receive sms wait, wait and wait. I waited 1 month, ONE MONTH, to unlock it. I've unlocked it first with unofficial but ANDROID 7 of xiaomi.eu lock it again, again and again.
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MIUI nougat sucks. Just flash cm 13.1

omlet said:
MIUI nougat sucks. Just flash cm 13.1
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it's great bro. MIUI is great. I used n5x.. mi4c is superb with miui

croccio said:
it's great bro. MIUI is great. I used n5x.. mi4c is superb with miui
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I saw directly difference between Resurrection Remix N, multitask, .... This is flagrant.

I downloaded all possible official ROMs, tried unsuccessfully to upgrade to each of them (even the very last dev) and I'm stuck with 8.5.1.0 from xiaomi.eu. This ROM sux alot of power. I wanna jump to another ROM but can't as the upgrade killed my root and TWRP and locked the bootloader. I'm opened to suggestions to avoid asking that SMS unlocker (even if it implies to slide thru 3 ROMs).

lg q6 unloxk bootloader

Hi. I want to unlock the boot loader lg q6. But i dont have a lg developer account. Iam tried to create . but its not happening. .. and. There is no lg q6. In the unlock bootloader list in lg web site. .
I want to install resurrection remix rom.
Thanks in advance. Sorry. For my bad english

First what you need for installing RR is the ROM itself. I don't know if there is any unoficial or oficial ROM released for the Q6 because this is a really young phone (I'm telling 4-5 months old so...)
Secondly, the bootloader is still not unlocked as I know. Again, because this is a really young phone, don't expect that much. NO, I'M LYING! There's a thread of the TWRP unoficial version for the Q6. But it's just for the M700X, for the other versions I still don't. Have a really good search on the internet and you'll find something that will be useful. Believe me, maybe you'll find something on the internet and if there's no information, wait a couple of months and see if there's something that you need for installing the ROM. Right nos, you just need to find how to unlock the bootloader and that's it.
Thirdly, there's no point flashing the TWRP if you have a valid warranty. If you flash it, good luck not breaking the phone because you don't have the warranty.
And also, if you really like flashing ROMs and you're into messing the setting on your phone, learn on how to code and make ROMs and everything that you need to do to be an expert in everything in tech.
Good Luck!

Any news from unlock bootloader? Anyone have unlock or root this phone?

F2 pro Help needed by expert in xiaomi.eu

Hi, I installed the Xiaomi bootloader unlock tool to unlock F2 pro's bootloader and thinking it will say 15 days after clicking on unlock. It instantly unlocked the bootloader rather than waiting for 7 or 15 days.
Now I want to install Xiaomi. Eu from, but I have some questions making me confuse. These Questions are the following...
1:Since the bootloader is already unlocked, and I wanted to use the call recorder function as well, SHould I install Xiaomi.eu from or wait for android 11 in global rom.
2:I have heard people cellphone getting bricked by installing marufrino twrp. Should I wait for official twp recovery, or this recovery just work fine for flashing Xiaomi.eu rom
Kindly give me a suggestion, I am a newbie and need help.
3:any advice u want to give me as a newbie

bilalrajput said:
Hi, I installed the Xiaomi bootloader unlock tool to unlock F2 pro's bootloader and thinking it will say 15 days after clicking on unlock. It instantly unlocked the bootloader rather than waiting for 7 or 15 days.
Now I want to install Xiaomi. Eu from, but I have some questions making me confuse. These Questions are the following...
1:Since the bootloader is already unlocked, and I wanted to use the call recorder function as well, SHould I install Xiaomi.eu from or wait for android 11 in global rom.
2:I have heard people cellphone getting bricked by installing marufrino twrp. Should I wait for official twp recovery, or this recovery just work fine for flashing Xiaomi.eu rom
Kindly give me a suggestion, I am a newbie and need help.
3:any advice u want to give me as a newbie
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U can install Indonesian rom if u want to have stock experience with miui message, dialer and contact. and u can lock bootloader on Indonesian rom also

Redmi 6 with Wrong Region ROM and Locked Bootloader.

I have a Redmi 6 (China version) that was sold to me as a Global edition. So when i updated the ROM much later and didn't unselect Lock Bootloader' it bricked the device.
Ive been reading up for weeks and trying to get it up and running again. I was planning on getting a Chinese ROM onto it then using the official xiaomi tool to unlock the bootloader once i signed into my xiaomi account on the phone.
I pursued the EDL method for sometime before realising it was a Mediatek phone. This week i have been trying to use the Mediatek Bypass to flash an official Chinese rom onto the phone but am getting the following error (see attached screenshot).
Just to clarify im just trying to flash a rom not unlock the bootloader with the mediatek bypass.
Is this possible?
If not are there any other methods i have not seen?
If not i can just give up which will be welcome
Thanks!

gords78 said:
I have a Redmi 6 (China version) that was sold to me as a Global edition. So when i updated the ROM much later and didn't unselect Lock Bootloader' it bricked the device.
Ive been reading up for weeks and trying to get it up and running again. I was planning on getting a Chinese ROM onto it then using the official xiaomi tool to unlock the bootloader once i signed into my xiaomi account on the phone.
I pursued the EDL method for sometime before realising it was a Mediatek phone. This week i have been trying to use the Mediatek Bypass to flash an official Chinese rom onto the phone but am getting the following error (see attached screenshot).
Just to clarify im just trying to flash a rom not unlock the bootloader with the mediatek bypass.
Is this possible?
If not are there any other methods i have not seen?
If not i can just give up which will be welcome
Thanks!
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Try firstly flashing the same Global ROM.

SubwayChamp said:
Try firstly flashing the same Global ROM.
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It wont run because once the bootloader is locked it will only run China ROMs

gords78 said:
It wont run because once the bootloader is locked it will only run China ROMs
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The tool is saying you that the firmware you are trying to flash doesn´t match with your device cause the name product was changed by the seller, it doesn´t hurt a try with that firmware.
Also you can try again with the Chinese firmware without flashing vbmeta.

SubwayChamp said:
The tool is saying you that the firmware you are trying to flash doesn´t match with your device cause the name product was changed by the seller, it doesn´t hurt a try with that firmware.
Also you can try again with the Chinese firmware without flashing vbmeta.
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Thanks. Ill give this a try later this evening.

Managed to get android booting by just flashing one file at a time as suggested on another forum. The one part that wouldn't flash was the 'cust' part of the rom.
Thank you still for the suggestions.

Just having problems getting my sim to work in it again. No its n a china rom it wont use my sim.